Research Paper Volume 7, Issue 12 pp 1077—1085
A shortened interval between vaccinations with the trivalent inactivated influenza vaccine increases responsiveness in the aged
Figure 2. Graph on the left shows increases of VNA titers to H1N1 between d0 and 14 after vaccination for the cohorts tested in different seasons.
Graph on the right shows responsiveness of the cohorts in the different years.